Lincoln Navigator Manuals

Lincoln Navigator: Exterior Lighting / Parking, Rear and License Plate Lamps. Diagnosis and Testing

Lincoln Navigator 2018-2025 Workshop Manual / Lighting / Exterior Lighting / Parking, Rear and License Plate Lamps. Diagnosis and Testing

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Module DTC Description Action
BCM B10F3:11 Left front position light: Circuit Short To Ground GO to Pinpoint Test D
BCM B10F3:15 Left front position light: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B10F4:11 Right front position light: Circuit Short To Ground GO to Pinpoint Test D
BCM B10F4:15 Right front position light: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B1445:11 Rear Park Lamps Output: Circuit Short To Ground GO to Pinpoint Test D
BCM B1445:15 Rear Park Lamps Output: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground GO to Pinpoint Test D
BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground GO to Pinpoint Test D
BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground GO to Pinpoint Test D
BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B14B2:11 Left Position Lamps: Circuit Short To Ground GO to Pinpoint Test D
BCM B14B2:15 Left Position Lamps: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B14B3:11 Right Position Lamps: Circuit Short To Ground GO to Pinpoint Test D
BCM B14B3:15 Right Position Lamps: Circuit Short To Battery Or Open GO to Pinpoint Test D
BCM B14E4:01 Extra Enhanced Exterior Lighting System: General Electrical Failure GO to Pinpoint Test E
BCM B14E4:08 Extra Enhanced Exterior Lighting System: Bus Signal/Message Failures GO to Pinpoint Test E
BCM B14E4:1C Extra Enhanced Exterior Lighting System: Circuit Voltage Out Of Range GO to Pinpoint Test E
BCM B14E4:49 Extra Enhanced Exterior Lighting System: Internal Electronic Failure GO to Pinpoint Test E
BCM B14E4:55 Extra Enhanced Exterior Lighting System: Not Configured GO to Pinpoint Test E
BCM B14E4:61 Extra Enhanced Exterior Lighting System: Signal Calculation Failure GO to Pinpoint Test E
LDCMA B124B:11 Left Daytime Running Light: Circuit Short To Ground GO to Pinpoint Test C
LDCMA B124B:12 Left Daytime Running Light: Circuit Short To Battery GO to Pinpoint Test C
LDCMA B124B:13 Left Daytime Running Light: Circuit Open GO to Pinpoint Test C
LDCMA B124B:14 Left Daytime Running Light: Circuit Short To Ground Or Open GO to Pinpoint Test C
LDCMA B124B:16 Left Daytime Running Light: Circuit Voltage Below Threshold GO to Pinpoint Test C
LDCMA B124B:1E Left Daytime Running Light: Circuit Resistance Out Of Range GO to Pinpoint Test C
LDCMA B124B:4B Left Daytime Running Light: Over Temperature GO to Pinpoint Test C
LDCMA B124B:87 Left Daytime Running Light: Missing Message GO to Pinpoint Test C
LDCMA B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground GO to Pinpoint Test B
LDCMA B149E:12 Left Front Position/Sidemarker: Circuit Short To Battery GO to Pinpoint Test B
LDCMA B149E:13 Left Front Position/Sidemarker: Circuit Open GO to Pinpoint Test B
LDCMA B149E:87 Left Front Position/Sidemarker: Missing Message GO to Pinpoint Test B
LDCMB B124A:11 Right Daytime Running Light: Circuit Short To Ground GO to Pinpoint Test C
LDCMB B124A:12 Right Daytime Running Light: Circuit Short To Battery GO to Pinpoint Test C
LDCMB B124A:13 Right Daytime Running Light: Circuit Open GO to Pinpoint Test C
LDCMB B124A:14 Right Daytime Running Light: Circuit Short To Ground Or Open GO to Pinpoint Test C
LDCMB B124A:16 Right Daytime Running Light: Circuit Voltage Below Threshold GO to Pinpoint Test C
LDCMB B124A:1E Right Daytime Running Light: Circuit Resistance Out Of Range GO to Pinpoint Test C
LDCMB B124A:4B Right Daytime Running Light: Over Temperature GO to Pinpoint Test C
LDCMB B124A:87 Right Daytime Running Light: Missing Message GO to Pinpoint Test C
LDCMB B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground GO to Pinpoint Test B
LDCMB B149F:12 Right Front Position/Sidemarker: Circuit Short To Battery GO to Pinpoint Test B
LDCMB B149F:13 Right Front Position/Sidemarker: Circuit Open GO to Pinpoint Test B
LDCMB B149F:87 Right Front Position/Sidemarker: Missing Message GO to Pinpoint Test B

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Appearance GO to Pinpoint Test E
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Inoperative GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Inoperative GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Inoperative GO to Pinpoint Test D
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Stays On GO to Pinpoint Test A
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Stays On GO to Pinpoint Test C
Lighting/Glass/Vision > Exterior Lighting > Parking/Running > Stays On GO to Pinpoint Test D
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Inoperative GO to Pinpoint Test B
Lighting/Glass/Vision > Exterior Lighting > Side Marker > Stays On GO to Pinpoint Test B

Symptom Charts

Symptom Chart: Parking, Rear and License Plate Lamps

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

Condition Possible Sources Actions
A module does not respond to the diagnostic scan tool
  • Fuse
  • Wiring, terminals or connectors
  • Module
 
REFER to: Controller Area Network (CAN) Module Communications Network (418-00A Controller Area Network (CAN) Module Communications Network, Diagnosis and Testing).
The Lincoln grille emblem lamp is inoperative or always on Refer to the Pinpoint Test   GO to Pinpoint Test A
An individual front side marker lamp only does not operate correctly Refer to the Pinpoint Test   GO to Pinpoint Test B
One or more front parking lamps do not operate correctly Refer to the Pinpoint Test   GO to Pinpoint Test C
One or more rear parking or license plate lamps are inoperative or always on Refer to the Pinpoint Test   GO to Pinpoint Test D
One or more parking lamps does not increase illumination during approach detection Refer to the Pinpoint Test   GO to Pinpoint Test E

Pinpoint Tests


PINPOINT TEST A: THE LINCOLN GRILLE EMBLEM LAMP IS INOPERATIVE OR ALWAYS ON

Refer to Wiring Diagrams Cell 85 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

Possible Sources

  • Lincoln grill emblem
  • Wiring, terminals or connectors
  • LDCMA
  • LH headlamp assembly

Visual Inspection and Pre-checks

  • Verify the BCMC (also known as the BJB ) fuse 43 (5A) is OK.
  • Inspect the grill emblem for damage
A1 CHECK GRILLE EMBLEM OPERATION AFTER PMI (PROGRAMMABLE MODULE INSTALLATION)
  • Using a diagnostic scan tool, complete the PMI process for the LDCMA ( LH headlamp) following the on-screen instructions.
  • Place the headlamp switch in the PARKING LAMPS position and observe the grille emblem.
  • Place the headlamp switch in the OFF position and observe the grille emblem.

Does the grille emblem operate correctly?
Yes GO to A2
No GO to A3

A2 CHECK THE VEHICLE HISTORY
  • Check the vehicle history for incorrect grille operation.

Has the vehicle had the same condition in the past?
Yes GO to A3
No INSPECT the grille emblem, wiring, LH headlamp and LDCMA for damage. REPAIR the wiring or REPLACE any damaged components. If not signs of damage are found, the system is operating correctly at this time.

A3 CHECK FOR SUPPLY VOLTAGE TO THE GRILL EMBLEM LAMP
  • Ignition OFF.
  • Disconnect: Signature Lamp (grill emblem) C1796.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1796-1   Ground

Is the voltage greater than 11 volts?
Yes GO to A5
No VERIFY BCMC (also known as the BJB ) fuse 43 (5A) is OK. If OK, GO to A4 If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.

A4 CHECK GRILL EMBLEM LAMP VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: BCMC C1035C.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1796-1   C1035C-14

Is the resistance less than 3 ohms?
Yes GO to A10
No REPAIR the circuit.

A5 CHECK THE GRILL EMBLEM LAMP GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1796-1   C1796-2

Is the voltage greater than 11 volts?
Yes GO to A6
No REPAIR the circuit.

A6 CHECK FOR SIGNAL VOLTAGE TO THE GRILL EMBLEM LAMP
  • Place the headlamp switch in the PARKLAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1796-3   Ground

Is the voltage approximately 4 volts?
Yes INSTALL a new grill emblem.
No GO to A7

A7 CHECK GRILL EMBLEM LAMP SIGNAL CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Place the headlamp switch in the OFF position.
  • Disconnect: LH Headlamp C1758.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1796-3   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to A8
No REPAIR the circuit.

A8 CHECK GRILL EMBLEM LAMP SIGNAL CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1796-3   C1758-4

Is the resistance less than 3 ohms?
Yes GO to A9
No REPAIR the circuit.

A9 CHECK THE LH (LEFT-HAND) HEADLAMP MOUNTED LDCMA (LIGHTING DRIVER CONTROL MODULE A)
  • Ignition OFF.
  • INSTALL a new LDCM on the suspect headlamp.
    REFER to: Light Sensor (417-01 Exterior Lighting, Removal and Installation).
  • Ignition ON.
  • Using a diagnostic scan tool, complete the PMI process for the LDCMA ( LH headlamp) following the on-screen instructions.
  • Place the headlamp switch in the PARKING LAMPS position and observe the grille emblem.
  • Place the headlamp switch in the OFF position and observe the grille emblem.

Does the grille emblem operate correctly?
Yes The system is operating correctly at this time. The concern was caused by the LDCMA .
No INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

A10 CHECK FOR CORRECT BCMC (BODY CONTROL MODULE C) OPERATION
  • Disconnect and inspect all BCMC connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCMC connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCMC .
REFER to: Body Control Module C (BCMC) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B: AN INDIVIDUAL FRONT SIDE MARKER LAMP ONLY DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
LDCMA B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the LDCMA detects a short to ground from the LH turn signal output circuit.
LDCMA B149E:12 Left Front Position/Sidemarker: Circuit Short To Battery A continuous memory and on-demand DTC that sets when the LDCMA detects a short to voltage from the LH turn signal output circuit.
LDCMA B149E:13 Left Front Position/Sidemarker: Circuit Open A continuous memory and on-demand DTC that sets when the LDCMA detects an open from the LH turn signal output circuit.
LDCMA B149E:87 Left Front Position/Sidemarker: Missing Message A continuous memory DTC that sets when the LDCMA detects a missing message from the HCM .
LDCMB B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the LDCMB detects a short to ground from the RH turn signal output circuit.
LDCMB B149F:12 Right Front Position/Sidemarker: Circuit Short To Battery A continuous memory and on-demand DTC that sets when the LDCMB detects a short to voltage from the RH turn signal output circuit.
LDCMB B149F:13 Right Front Position/Sidemarker: Circuit Open A continuous memory and on-demand DTC that sets when the LDCMB detects an open from the RH turn signal output circuit.
LDCMB B149F:87 Right Front Position/Sidemarker: Missing Message A continuous memory DTC that sets when the LDCMB detects a missing message from the HCM .

Possible Sources

  • Wiring, terminals or connectors
  • Headlamp assembly
  • LDCMA ( LH headlamp)
  • LDCMB ( RH headlamp)
  • BCM
B1 CHECK THE SIDE MARKER LAMP OPERATION AFTER A COOL DOWN PERIOD
  • Allow the vehicle turn lamps to cool to room temperature.
  • Ignition ON.
  • After the turn lamps cool, using a diagnostic scan tool, CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON.
  • Place the headlamp switch in the PARKING LAMPS position and observe the side marker lamp.
  • Place the headlamp switch in the OFF position and observe the side marker lamp.

Does the side marker operate correctly?
Yes INSPECT the headlamp and LDCM for damage or debris. The DTC set and DRL stopped working do to the headlamp or LDCM temporarily overheating.
No GO to B2

B2 CHECK SIDE MARKER LAMP OPERATION AFTER PMI (PROGRAMMABLE MODULE INSTALLATION)
  • Using a diagnostic scan tool, complete the PMI process for the LDCMA ( LH headlamp) or LDCMB ( RH headlamp) following the on-screen instructions.
  • Place the headlamp switch in the PARKING LAMPS position and observe the side marker lamp.
  • Place the headlamp switch in the OFF position and observe the side marker lamp.

Does the side marker operate correctly?
Yes GO to B3
No GO to B4

B3 CHECK THE VEHICLE HISTORY
  • Check the vehicle history for incorrect grille operation.

Has the vehicle had the same condition in the past?
Yes GO to B4
No INSPECT the LH headlamp and LDCMA or RH headlamp and LDCMB for damage. REPAIR the wiring or REPLACE any damaged components. If not signs of damage are found, the system is operating correctly at this time.

B4 CHECK THE HEADLAMP MOUNTED LDCM (LIGHTING DRIVER CONTROL MODULE)
  • Ignition OFF.
  • INSTALL a new LDCM on the suspect headlamp.
    REFER to: Lighting Driver Control Module (417-01 Exterior Lighting, Removal and Installation).
  • Ignition ON.
  • Using a diagnostic scan tool, complete the PMI process for the LDCMA ( LH headlamp) or for the LDCMB ( RH headlamp) following the on-screen instructions.
  • Place the headlamp switch in the PARKING LAMPS position and observe the side marker lamp.
  • Place the headlamp switch in the OFF position and observe the side marker lamp.

Does the side marker operate correctly?
Yes INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No The system is operating correctly at this time. The concern was caused by the LDCM .

PINPOINT TEST C: ONE OR MORE FRONT PARKING LAMPS DO NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
LDCMA B124B:11 Left Daytime Running Light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the LDCMA detects a short to ground from the LH headlamp internal daytime running/parking lamp circuit.
LDCMA B124B:12 Left Daytime Running Light: Circuit Short To Battery A continuous memory and on-demand DTC that sets when the LDCMA detects a short to voltage from the LH headlamp internal daytime running/parking lamp circuit.
LDCMA B124B:13 Left Daytime Running Light: Circuit Open A continuous memory and on-demand DTC that sets when the LDCMA detects an open from the LH headlamp internal daytime running/parking lamp circuit.
LDCMA B124B:14 Left Daytime Running Light: Circuit Short To Ground Or Open A continuous memory and on-demand DTC that sets when the LDCMA detects an open or short to ground from the LH headlamp internal daytime running/parking lamp circuit.
LDCMA B124B:16 Left Daytime Running Light: Circuit Voltage Below Threshold A continuous memory and on-demand DTC that sets when the LDCMA detects a low voltage on the LH headlamp internal daytime running/parking lamp circuit.
LDCMA B124B:1E Left Daytime Running Light: Circuit Resistance Out Of Range A continuous memory and on-demand DTC that sets when the LDCMA detects an incorrect resistance on the LH headlamp internal daytime running/parking lamp circuit.
LDCMA B124B:4B Left Daytime Running Light: Over Temperature A continuous memory and on-demand DTC that sets when the LDCMA detects a high temperature LH headlamp internal daytime running/parking lamp circuit driver.
LDCMA B124B:87 Left Daytime Running Light: Missing Message A continuous memory and on-demand DTC that sets when the LDCMA detects a message missing from the HCM over the CAN .
LDCMB B124A:11 Right Daytime Running Light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the LDCMB detects a short to ground from the RH headlamp internal daytime running/parking lamp circuit.
LDCMB B124A:12 Right Daytime Running Light: Circuit Short To Battery A continuous memory and on-demand DTC that sets when the LDCMB detects a short to voltage from the RH headlamp internal daytime running/parking lamp circuit.
LDCMB B124A:13 Right Daytime Running Light: Circuit Open A continuous memory and on-demand DTC that sets when the LDCMB detects an open from the RH headlamp internal daytime running/parking lamp circuit.
LDCMB B124A:14 Right Daytime Running Light: Circuit Short To Ground Or Open A continuous memory and on-demand DTC that sets when the LDCMB detects an open or short to ground from the RH headlamp internal daytime running/parking lamp circuit.
LDCMB B124A:16 Right Daytime Running Light: Circuit Voltage Below Threshold A continuous memory and on-demand DTC that sets when the LDCMB detects a low voltage on the RH headlamp internal daytime running/parking lamp circuit.
LDCMB B124A:1E Right Daytime Running Light: Circuit Resistance Out Of Range A continuous memory and on-demand DTC that sets when the LDCMB detects an incorrect resistance on the RH headlamp internal daytime running/parking lamp circuit.
LDCMB B124A:4B Right Daytime Running Light: Over Temperature A continuous memory and on-demand DTC that sets when the LDCMB detects a high temperature RH headlamp internal daytime running/parking lamp circuit driver.
LDCMB B124A:87 Right Daytime Running Light: Missing Message A continuous memory and on-demand DTC that sets when the LDCMB detects a message missing from the HCM over the CAN .

Possible Sources

  • Wiring, terminals or connectors
  • Headlamp assembly
  • LDCMA ( LH headlamp)
  • LDCMB ( RH headlamp)
  • BCM

Visual Inspection and Pre-checks

  • Verify the BCMC (also known as the BJB ) fuse 100 (25A) ( LH headlamp) or fuse 101 (25A) ( RH headlamp) is OK.
C1 CHECK THE LOW BEAMS AND FRONT TURN SIGNAL LAMP OPERATION
  • Ignition ON.
  • Activate the hazard lamp function and observe the front turn signal lamps.
  • Place the headlamp switch in the HEADLAMP position.
  • Place the LH steering column multifunction switch in the high beam position and observe the high beams.

Are the LH high beams, front parking lamps and turn signals all inoperative or are the RH high beams, front parking lamps and turn signals all inoperative?
Yes VERIFY the BCMC (also known as the BJB ) fuse 100 (25A) ( LH headlamp) or fuse 101 (25A) ( RH headlamp) is OK. If OK, GO to C2 If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.
No If all the LH and RH parking lamps are inoperative or are always ON, GO to C11
If only the LH parking lamps or only the RH parking lamps are inoperative or not operating correctly, GO to C4
If only the LH parking lamps or only the RH parking lamps are always on, GO to C9

C2 CHECK THE HEADLAMP MOUNTED LDCM (LIGHTING DRIVER CONTROL MODULE) VOLTAGE CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect: Suspect LH Headlamp C1758 or RH Headlamp C1759.
  • Ignition ON.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1758-1   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1759-1   Ground

Is the voltage greater than 11 volts?
Yes GO to C3
No REPAIR the circuit.

C3 CHECK THE HEADLAMP MOUNTED LDCM (LIGHTING DRIVER CONTROL MODULE) GROUND CIRCUITS FOR AN OPEN
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1758-1   C1758-2

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1759-1   C1759-2

Is the voltage greater than 11 volts?
Yes GO to C9
No REPAIR the circuit.

C4 CHECK FOR LDCMA (LIGHTING DRIVER CONTROL MODULE A) OR LDCMB (LIGHTING DRIVER CONTROL MODULE B) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, perform the LDCMA ( LH headlamp) or LDCMB ( RH headlamp) self-test.

Is LDCMA DTC B124B:16, B124B:1E or B124B:4B or LDCMB DTC B124A:16, B124A:1E or B124A:4B present?
Yes GO to C5
No GO to C7

C5 CHECK FOR LDCMA (LIGHTING DRIVER CONTROL MODULE A) OR LDCMB (LIGHTING DRIVER CONTROL MODULE B) DIAGNOSTIC TROUBLE CODES (DTCS) AFTER A COOL DOWN PERIOD
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Allow the vehicles and headlamps to cool to room temperature.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • After the headlamps cool, using a diagnostic scan tool, perform the LDCMA ( LH headlamp) or LDCMB ( RH headlamp) self-test.

Is LDCMA DTC B124B:16, B124B:1E or B124B:4B or LDCMB DTC B124A:16, B124A:1E or B124A:4B present?
Yes GO to C9
No GO to C6

C6 RECHECK THE PARKING LAMPS
  • Observe the front parking lamps.

Do the parking lamps operate correctly?
Yes INSPECT the headlamp and LDCM for damage or debris. The DTC set and parking lamps stopped working do to the headlamp or LDCM overheating.
No GO to C7

C7 CHECK THE HEADLAMP MOUNTED LDCM (LIGHTING DRIVER CONTROL MODULE) VOLTAGE CIRCUITS FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect: Suspect LH Headlamp C1758 or RH Headlamp C1759.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1758-1   Ground
      C1758-9   Ground

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1759-1   Ground
      C1759-9   Ground

Is the voltage greater than 11 volts?
Yes GO to C8
No REPAIR the circuit.

C8 CHECK THE HEADLAMP MOUNTED LDCM (LIGHTING DRIVER CONTROL MODULE) GROUND CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors

      LH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1758-1   C1758-2
      C1758-1   C1758-10

    Click to display connectors

      RH Headlamp


    Positive Lead Measurement / Action Negative Lead
      C1759-1   C1759-2
      C1759-1   C1759-10

Is the voltage greater than 11 volts?
Yes GO to C9
No REPAIR the circuit.

C9 CHECK THE HEADLAMP
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Substitute the known good headlamp assembly from the opposite side of the vehicle.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS positions.
  • CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. REPEAT the self-test.

Is the concern still present or do the Diagnostic Trouble Codes (DTCs) return?
Yes GO to C11
No GO to C10

C10 CHECK THE HEADLAMP MOUNTED LDCM (LIGHTING DRIVER CONTROL MODULE)
  • Place the headlamp switch in the OFF positions.
  • Ignition OFF.
  • Reinstall the original headlamp assembly for the inoperative side of the vehicle.
  • INSTALL a new LDCM on the suspect headlamp.
    REFER to: Lighting Driver Control Module (417-01 Exterior Lighting, Removal and Installation).
  • Ignition ON.
  • Using a diagnostic scan tool, complete the PMI process for the LDCMA ( LH headlamp) or for the LDCMB ( RH headlamp) following the on-screen instructions.
  • Place the headlamp switch in the PARKING LAMPS positions.
  • CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT the self-test (required to enable the lamp output driver) and cycle the ignition OFF and ON. REPEAT the self-test.

Is the concern still present or does any Diagnostic Trouble Codes (DTCs) return?
Yes REMOVE the known good LDCM control module. INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No The system is operating correctly at this time. The concern may was caused by the LDCM .

C11 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST D: ONE OR MORE REAR PARKING OR LICENSE PLATE LAMPS ARE INOPERATIVE OR ALWAYS ON

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B10F3:11 Left front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH rear parking lamps output circuit.
BCM B10F3:15 Left front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B10F4:11 Right front position light: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH rear parking lamps output circuit.
BCM B10F4:15 Right front position light: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.
BCM B1445:11 Rear Park Lamps Output: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate and liftgate parking lamp output circuit.
BCM B1445:15 Rear Park Lamps Output: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate and liftgate parking lamp output circuit.
BCM B149E:11 Left Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH rear parking lamps output circuit.
BCM B149E:15 Left Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking lamps output circuit.
BCM B149F:11 Right Front Position/Sidemarker: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH rear parking lamps output circuit.
BCM B149F:15 Right Front Position/Sidemarker: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamps output circuit.
BCM B14A2:11 Tailgate/Liftgate Applique Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the license plate lamps output circuit.
BCM B14A2:15 Tailgate/Liftgate Applique Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the license plate lamps output circuit.
BCM B14B2:11 Left Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH rear parking lamp output circuit.
BCM B14B2:15 Left Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear parking marker lamp output circuit.
BCM B14B3:11 Right Position Lamps: Circuit Short To Ground A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH rear parking lamp output circuit.
BCM B14B3:15 Right Position Lamps: Circuit Short To Battery Or Open A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH rear parking lamp output circuit.

Possible Sources

  • Wiring, terminals or connectors
  • Rear lamp assembly
  • Reversing lamp assembly
  • BCM
D1 DETERMINE IF ALL THE REAR PARKING LAMPS ARE INOPERATIVE
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.

Are all license plate lamps, rear side marker lamps and the liftgate parking lamp inoperative?
Yes GO to D12
No If the license plate lamps, rear side marker lamps or the liftgate parking lamps are always on, GO to D2
If one license plate lamp is inoperative, INSTALL a new license plate lamp. TEST the system for normal operation. If the condition still exists, INSTALL a new illuminated liftgate applique.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation). If all liftgate parking lamps and license plate lamps are inoperative, GO to D3
If both rear parking lamps are inoperative, GO to D12
If one rear parking lamp are inoperative, GO to D7

D2 CHECK THE BCM (BODY CONTROL MODULE) PARKING LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition OFF.
  • Disconnect: BCM C2280E (For rear parking lamps).
  • Disconnect: BCM C2280C (For license plate and liftgate parking lamps).
  • Ignition ON.

Do the parking lamps continue to illuminate?
Yes REPAIR the circuit in question.
No GO to D12

D3 CHECK THE LIFTGATE LAMPS VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect: Illuminated Liftgate Applique C4352A.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352A-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to D4

D4 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE LIFTGATE LAMPS VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE
  • Place the headlamp switch in the OFF position.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C4352A-1   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No GO to D5

D5 CHECK THE LAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect: BCM C2280C.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280C-12   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to D6
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

D6 CHECK THE LAMP SUPPLY CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280C-12   C4352A-1

Is the resistance less than 3 ohms?
Yes GO to D12
No REPAIR the circuit in question.

D7 CHECK THE FOR VOLTAGE TO THE REAR PARKING LAMP
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect: Inoperative LH Rear Lamp C4483 or RH Rear Lamp C4484.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4483-2   Ground

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4484-2   Ground

Is the voltage greater than 11 volts?
Yes GO to D9
No GO to D8

D8 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR PARKING LAMP
  • Place the headlamp switch in the OFF position.
  • Using a diagnostic scan tool, perform the BCM self-test.
  • Clear the Diagnostic Trouble Codes (DTCs) and repeat the self-test (required to enable the lamp output driver).
  • Ignition OFF.
  • Ignition ON.
  • Place the headlamp switch in the PARKING LAMPS position.
  • Measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4483-2   Ground

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4484-2   Ground

Is the voltage greater than 11 volts?
Yes INSTALL a new rear lamp assembly.
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No GO to D10

D9 CHECK THE REAR PARKING LAMP GROUND CIRCUIT
  • Measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4483-2   C4483-1

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4484-2   C4484-1

Is the voltage greater than 11 volts?
Yes INSTALL a new rear lamp assembly.
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.

D10 CHECK THE REAR PARKING LAMP SUPPLY CIRCUIT FOR AN OPEN
  • Place the headlamp switch in the OFF position.
  • Ignition OFF.
  • Disconnect: BCM C2280E.
  • Measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4483-2   C2280E-25

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4484-2   C2280E-51

Is the resistance less than 3 ohms?
Yes GO to D11
No REPAIR the circuit.

D11 CHECK VOLTAGE CIRCUIT TO THE REAR PARKING LAMP FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors

      LH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4483-2   Ground

    Click to display connectors

      RH Rear Parking Lamp


    Positive Lead Measurement / Action Negative Lead
      C4484-2   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to D12
No REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).

D12 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST E: ONE OR MORE PARKING LAMPS DOES NOT INCREASE ILLUMINATION DURING APPROACH DETECTION

Refer to Wiring Diagrams Cell 92 for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Exterior Lighting (417-01 Exterior Lighting, Description and Operation).

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
BCM B14E4:01 Extra Enhanced Exterior Lighting System: General Electrical Failure A continuous memory and on-demand DTC that sets when the BCM detects an internal failure from the rear lamp fade control module.
BCM B14E4:08 Extra Enhanced Exterior Lighting System: Bus Signal/Message Failures A continuous memory and on-demand DTC that sets when the BCM detects a message failure from the rear lamp fade control module.
BCM B14E4:1C Extra Enhanced Exterior Lighting System: Circuit Voltage Out Of Range An on-demand DTC that sets when the BCM detects a an internal failure from the rear lamp fade control module.
BCM B14E4:49 Extra Enhanced Exterior Lighting System: Internal Electronic Failure A continuous memory and on-demand DTC that sets when the BCM detects an internal failure from the rear lamp fade control module.
BCM B14E4:55 Extra Enhanced Exterior Lighting System: Not Configured A continuous memory and on-demand DTC that sets when the BCM detects the rear lamp fade control module is not configured.
BCM B14E4:61 Extra Enhanced Exterior Lighting System: Signal Calculation Failure An on-demand DTC that sets when the BCM detects a an internal failure from the rear lamp fade control module.

Possible Sources

  • Wiring, terminals or connectors
  • LDCM
  • Headlamp assembly
  • Rear lamp assembly
  • BCM
E1 CHECK APPROACH DETECTION OPERATION
  • Ignition OFF.
  • Make sure the liftgate and all the doors are closed and locked and all valid programmed passive keys are outside of the area of detection (more than 10 feet) longer than 60 seconds.
  • While observing the operation of the front and rear parking lamps approach the vehicle.

Do any parking lamps increase in brightness when you approach near the vehicle?
Yes If only a single front parking lamp does not illuminate, INSTALL a new LDCM .
REFER to: Lighting Driver Control Module (417-01 Exterior Lighting, Removal and Installation). If only a single rear parking lamp or only the liftgate parking lamps do not illuminate, GO to E3
If only the license plate lamps do not illuminate, GO to E4
If all rear parking and liftgate parking lamps do not illuminate, GO to E9
No GO to E2

E2 CHECK THAT APPROACH DETECTION IS ENABLED
  • Check if the approach detection is enabled through the IPC message center.

Is approach detection enabled?
Yes DIAGNOSE for the approach detection feature is inoperative.
REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
No ENABLE approach detection. REFER to the Owner's Literature for information on enabling approach detection

E3 CHECK THE REAR LAMP OR LIFTGATE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR AN OPEN
  • Disconnect: Inoperative LH Rear Lamp Assembly C4483.
  • Disconnect: Inoperative RH Rear Lamp Assembly C4484.
  • Disconnect: Inoperative Illuminated Liftgate Applique C4352A.
  • Disconnect: BCM C2280F.
  • Measure:
    Click to display connectors

      LH Rear Lamp Assembly


    Positive Lead Measurement / Action Negative Lead
      C4483-8   C2280F-15

    Click to display connectors

      RH Rear Lamp Assembly


    Positive Lead Measurement / Action Negative Lead
      C4484-8   C2280F-15

    Click to display connectors

      Liftgate Parking Lamps


    Positive Lead Measurement / Action Negative Lead
      C4352A-9   C2280F-15

Is the resistance less than 3 ohms?
Yes For an inoperative rear lamp parking lamp, INSTALL a new rear lamp assembly.
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation). For inoperative liftgate parking lamps, INSTALL a new reversing lamp.
REFER to: Reversing Lamp (417-01 Exterior Lighting, Removal and Installation).
No REPAIR the circuit.

E4 CHECK THE LICENSE PLATE LAMPS PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Disconnect: RH Headlamp C1759.
  • Disconnect: Inoperative Illuminated Liftgate Applique C4352A.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1759-4   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to E5
No REPAIR the circuit.

E5 CHECK THE LICENSE PLATE LAMPS PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1759-4   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to E6

E6 CHECK THE LICENSE PLATE LAMPS PWM (PULSE WIDTH MODULATION) CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1759-4   C4352A-2

Is the resistance less than 3 ohms?
Yes GO to E7
No REPAIR the circuit.

E7 CHECK THE RH (RIGHT-HAND) HEADLAMP MOUNTED LDCMB (LIGHTING DRIVER CONTROL MODULE B) PROGRAMMING
  • Ignition ON.
  • Using a diagnostic scan tool, complete the PMI process for the LDCMB following the on-screen instructions.
  • Ignition OFF.
  • Make sure the liftgate and all the doors are closed and locked and all valid programmed passive keys are outside of the area of detection (more than 10 feet) longer than 60 seconds.
  • While observing the operation of the license plate lamps approach the vehicle.

Do the license plate lamps increase in brightness when you approach near the vehicle?
Yes The system is operating correctly at this time. The concern was caused by the LDCM programming.
No GO to E8

E8 CHECK THE RH (RIGHT-HAND) HEADLAMP MOUNTED LDCMB (LIGHTING DRIVER CONTROL MODULE B)
  • INSTALL a new LDCM on the suspect headlamp.
    REFER to: Lighting Driver Control Module (417-01 Exterior Lighting, Removal and Installation).
  • Ignition ON.
  • Using a diagnostic scan tool, complete the PMI process for the LDCMA ( LH headlamp) or for the LDCMB ( RH headlamp) following the on-screen instructions.
  • Ignition OFF.
  • Make sure the liftgate and all the doors are closed and locked and all valid programmed passive keys are outside of the area of detection (more than 10 feet) longer than 60 seconds.
  • While observing the operation of the license plate lamps approach the vehicle.

Do the license plate lamps increase in brightness when you approach near the vehicle?
Yes The system is operating correctly at this time. The concern may was caused by the LDCM .
No REMOVE the known good LDCM control module. INSTALL a new headlamp assembly.
REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).

E9 CHECK THE LIN (LOCAL INTERCONNECT NETWORK) CIRCUIT FOR A SHORT TO VOLTAGE
  • Disconnect: Inoperative LH Rear Lamp Assembly C4483.
  • Disconnect: Inoperative RH Rear Lamp Assembly C4484.
  • Disconnect: Inoperative Illuminated Liftgate Applique C4352A.
  • Disconnect: BCM C2280F.
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280F-15   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to E10

E10 CHECK THE REAR LAMP FADE CONTROL MODULE PWM (PULSE WIDTH MODULATION) CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280F-15   Ground

Is the resistance greater than 10,000 ohms?
Yes GO to E11
No REPAIR the circuit.

E11 CHECK THE REAR LAMP FADE CONTROL MODULE PWM (PULSE WIDTH MODULATION) CIRCUIT FOR AN OPEN
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2280F-15   C4483-8

Is the resistance less than 3 ohms?
Yes GO to E12
No REPAIR the circuit.

E12 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Disconnect and inspect all BCM connectors.
  • Repair:
    • corrosion (install new connector or terminals – clean module pins)
    • damaged or bent pins – install new terminals/pins
    • pushed-out pins – install new pins as necessary
  • Reconnect the BCM connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB , SSM or FSA . If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new BCM .
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.


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